1. The survey area, of a terrain of middle and low mountains and narrow valleys, is characterized by distinct topographical relief, high mountains, steep slopes, deep valleys, developed gulches, crisscross network of ravines, and plenty of hills and mountains.
勘察区属于中低山窄谷地貌，地形起伏较大，山高、坡陡、谷深，冲沟发育、深切，沟壑纵横，山峦重叠。